Imagine that the standard labour time to prepare a sandwich is 2.9 minutes. Food assemblers are paid an hourly rate of $18. Company contributions to employment insurance, etc., add another $1.2 to the wage costs. The actual labour cost per hour was $10 (including the company contributions to employment insurance, etc.) and it took 3.7 minutes to prepare one meal. 7305 meals were prepared last week.

What is the total labour efficiency variance?